dom/canvas/test/webgl-mochitest/test_noprog_draw.html

   1 <!DOCTYPE HTML>
   2 <meta http-equiv="content-type" content="text/html; charset=utf-8" />
   3
   4 <title>WebGL test: Drawing with a null program</title>
   5
   6 <script src="/tests/SimpleTest/SimpleTest.js"></script>
   7 <link rel="stylesheet" href="/tests/SimpleTest/test.css">
   8 <script src="driver-info.js"></script>
   9 <script src="webgl-util.js"></script>
  10
  11
  12 <script id="vs" type="x-shader/x-vertex">
  13
  14 void main(void) {
  15   gl_PointSize = 16.0;
  16   gl_Position = vec4(0.0, 0.0, 0.0, 1.0);
  17 }
  18
  19 </script>
  20 <script id="fs" type="x-shader/x-fragment">
  21
  22 precision mediump float;
  23
  24 void main(void) {
  25   gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);
  26 }
  27
  28 </script>
  29 <body>
  30 <canvas id="c" width="64" height="64"></canvas>
  31 <script>
  32
  33 // Give ourselves a scope to return early from:
  34 (function() {
  35   var gl = c.getContext('webgl');
  36   if (!gl) {
  37     todo(false, 'WebGL is unavailable.');
  38     return;
  39   }
  40
  41   gl.disable(gl.DEPTH_TEST);
  42
  43   var prog   = WebGLUtil.createProgramByIds(gl, 'vs', 'fs');
  44   if (!prog) {
  45     ok(false, 'Program linking should succeed.');
  46     return;
  47   }
  48
  49   function checkGLError(func, info, refValue) {
  50     if (!refValue)
  51       refValue = 0;
  52
  53     var error = gl.getError();
  54     func(error == refValue,
  55          '[' + info + '] gl.getError should be 0x' + refValue.toString(16) +
  56                                         ', was 0x' + error.toString(16) + '.');
  57   }
  58
  59   // Start drawing
  60   checkGLError(ok, 'after setup');
  61
  62   gl.useProgram(prog);
  63   gl.drawArrays(gl.POINTS, 0, 1);
  64   checkGLError(ok, 'after non-null-program DrawArrays');
  65
  66   gl.useProgram(null);
  67   gl.drawArrays(gl.POINTS, 0, 1);
  68   checkGLError(ok, 'after null-program DrawArrays', gl.INVALID_OPERATION);
  69
  70   ok(true, 'Test complete.');
  71 })();
  72
  73 </script>
  74